Fitness is in reach for almost everyone on Hacker News. There are folks who have serious health issues or disabilities that preclude exercise... but the rest of us [the majority?] can walk more, do body weight squats, some form of incline push ups, and so forth and build larger successes on top of smaller ones. We can start by taking a morning and evening walk.
We all can make healthier decision about what food we put into our bodies (a lot could be done to make our food supply healthier, as well). I find I have to be more strict about eating right as I get older to maintain my health.
I feel like folks saying 'fitness' isn't in reach [for most/many of us] is a cop out. This is anecdotal, but i know people who have lost 100+ lbs in their 40's and 50's and completely turned their life around; I know people who have reversed Type-2 diabetes through diet and exercise. These people have busy lives with a lot of responsibility... some of these people live in city areas where access to gyms or outdoor spaces for walking, etc. is not convenient.
I have a few doctors and other medical professionals in my family... knowing what I know, I am 'almost terrified' of becoming metabolically unhealthy and overweight. Many of the maladies that afflict us are metabolic disorders (in whole or in part) due to the long term effects of poor diet, lack of exercise & quality sleep (high stress doesn't help either). Poor metabolic health tremendously increases risk of almost every disease and malady: diabetes, heart disease, heart attack, dementia & Alzhiemer's, many cancers, stroke, depression and other mental illnesses, sleep apnea, susceptibility to infectious disease, etc. Poor metabolic health also indirectly leads to higher likelihood of issues causing chronic pain: e.g., herniated discs in the spine, ankle/knee/hip problems, migraine headaches.
I'm glad Ozempic exists but it is not a cure... it is an aid towards building a healthier life. Use Ozempic as a tool, by all means!!, to start your journey and get yourself into a better situation physically. But please use that good start to pursue the 'best/healthy you'... do it for yourself.